2720164108709 has 2 divisors, whose sum is σ = 2720164108710. Its totient is φ = 2720164108708.

The previous prime is 2720164108661. The next prime is 2720164108763. The reversal of 2720164108709 is 9078014610272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2626311948100 + 93852160609 = 1620590^2 + 306353^2 .

It is a cyclic number.

It is not a de Polignac number, because 2720164108709 - 2²⁰ = 2720163060133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2720164108789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360082054354 + 1360082054355.

It is an arithmetic number, because the mean of its divisors is an integer number (1360082054355).

Almost surely, 2^{2720164108709} is an apocalyptic number.

It is an amenable number.

2720164108709 is a deficient number, since it is larger than the sum of its proper divisors (1).

2720164108709 is an equidigital number, since it uses as much as digits as its factorization.

2720164108709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 47.

The spelling of 2720164108709 in words is "two trillion, seven hundred twenty billion, one hundred sixty-four million, one hundred eight thousand, seven hundred nine".